Stop device for levers



T. PIDGEON.

' STOP DEVICE FOR LEVERS. k APPLICATION FILED MAY I3, I92]- 1 ,427,969 Patented Sept. '5, '1922.

A -TTORNEYS.

Patented Sept. 5, H922.

THOMAS PIDGEON, OF HIGHLAND PARK, KENTUCKY.

STOP DEVICE FOR LEVERS.

Application filed May 13,

To all to 7mm it may concern Be it known that I, THOMAS PmGnoN, a citizen of the United States, residing at Highland Park, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Stop Devices for Levers, of which the following is a specification.

This invention has for its object to pro- 10 vide a simple device for regulating the amount of steam to be admitted to the cylinders of locomotives under certain conditions and at certain times. Ordinarily, the -engineer must estimate the distance the throttle lever has to be moved to supply the proper amount of steam to the cylinders, and the correct position of the lever is often obtained only after many trials. The present invention provides an adjustable abutment which is in the path of the throttle lever, and which can be accurately set to stop the lever when it has oved a distance to supply the desired amount of steam to the cylinders, whereas, when steam is to be shut off entirely, the

abutment can be swung out of the way of the throttle lever so that the latter may be moved over far enough to effect a complete shutoff of steam.

In order that the invention may be better understood, reference is had to the acc0mpanying drawing forming a part of this specification. The preferred embodiment of the invention has been disclosed, but it will be understood that various changes and modifications may be made without a departure from the spirit and scope of the in. vention as claimed hereinafter.

In the drawing- Figure 1 is an elevation showing the ap- 40 plication of the invention; Fig. 2'is an elevation of the device detached, and Fig. 8 is an edge view thereof.

Referring specifically to the drawing, 5 denotes the throttle lever of a locomotive, 5 and at 6 is shown the usual notched sector for locking the lever, the latter being" equipped with a latch device as usual for engagement with the notches of the sector. As the latch is a well-known expedient, it

has not been illustrated.

On one face of the sector 6, in the path of the lever 5, is positioned a stop finger 7 which is pivoted at its inner end to a supporting plate 8. This plate has hinge knuckles 9 at one end between which the 1921. Serial No. 469,279.

inner end of the finger 7 seats, and a pin 10 passing through said parts completes the pivotal connection of the finger with the plate.

The plate 8 is fastened to the face of the sector 6 by a screw orother fasteningdevice l1, and said plate has a longitudinal slot 12 through which the screw passes, as shown in Fig. 1. The purpose of the slot 12 is to permit the plate 8 to be adjusted in the direction of the length of the sector 6 to position the finger 7 at the proper loca tion where it will act as a stop to limit the movement of the lever 5 in one direction, and in this manner determine the correct position to which the lever must be moved to obtain the desired supply of stea to the cylinders.

It will be noted that the finger 7 is in the path the lever 5 takes when it is moved to throttle-closing; position, and if the throttle is to be entirely closed, it. is necessary only to swing the finger forwardly out of the way of the lever, as shown in dotted lines in Fig. 3, after which the lever can be moved to full-closing position.

The device is very simple in construction, and it can be readily attached to the sector 6 without any changes in the structure of the latter. The device is also very efiicient for the purpose for which it has been designed, and adjustment can be easily made. It will be understood, that the device can also. be used in connection with other levers which require to he moved at times to a certain predetermined position.

I claim:

The combination with a throttle lever and a support to which the lever is pivoted and across the face of which it is adapted to be swung; of an abutment positioned to extend into the path of the lever to intercept the same when it is swung toward throttle-closing position, said abutment being pivoted to swing laterally of the lever out of the path thereof to permit completion of the swing of the lever to throttle-closing position, a base member on the aforesaid support to which member the abutment is pivoted, said member having a slot extending'in the direction the lever swings, and a fastening means for the base member passing through the slot thereof into the support.

In testimony whereof I afiix my signature.

THOMAS PIDGEON. 

